feat(deploy): stream live build logs in build progress modal

Show real-time kaniko/init-container build output inside the build
progress modal during the building/deploying phases, alongside the
existing percentage. The build-logs endpoint now returns live pod logs
while a build is in progress (falling back to the persisted log once
finished), and the modal polls it every 2s with auto-scroll. Minimize
behaviour is unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/src/deployments/deployments.service.ts

@@ -507,8 +507,19 @@ export class DeploymentsService {
       };
     }
 
+    // While the build is in progress the persisted buildLog isn't written yet —
+    // stream the live build pod logs so the deploy modal can show them in real time.
+    let buildLog = latest.buildLog || null;
+    if (
+      latest.status === DeploymentStatus.BUILDING ||
+      latest.status === DeploymentStatus.DEPLOYING
+    ) {
+      const live = await this.buildService.getLiveBuildLog(latest.id);
+      if (live) buildLog = live;
+    }
+
     return {
-      buildLog: latest.buildLog || null,
+      buildLog,
       status: latest.status,
       version: latest.version,
       createdAt: latest.createdAt,